'How to write valid JSON data in logs in java Spring Boot

Logs file currently

"message":"{\"productID\":\"999\",\"productName\":\"Shoes",\"productCost\":\"1200\"}" the data is fine but JSON format it not valid

Code currently used to convert a model into JSON

 public static String test(Object obj) {
        ObjectMapper ow = new ObjectMapper();
        try {
            ow.setSerializationInclusion(JsonInclude.Include.NON_NULL);
            return ow.writer().writeValueAsString(obj);
        } catch (JsonProcessingException e) {
            e.printStackTrace();
        }
        return "";
    }

Log code used to write in log file.

logg.info(MainClass.test(productBean);

Log configurations in logback.xml. logger I have used is of org.slf4j

``

<appender name="testLog">
<filter class="ch.qos.logback.classic.filter.ThresholdFilter">
<level>info</level>
</filter>
<file>C:/Logs/logs.log</file>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>C:/Logs/logs.log</fileNamePattern>
<maxHistory>30</maxHistory>
</rollingPolicy>
</appender>

<logger name = "com.demo" level="INFO">
<appender-ref ref="testLog" />
</logger>

``

javajsonspring-boot


Solution 1:[1]

In the logback.xml where we specify our appenders and loggers we need to add the encoder tag for our appender.

<encoder>
<pattern>%date{yyyy-MM-dd HH:mm:ss:SSS} | %-5level [%thread] %message%n</pattern>
</encoder>

Solution 2:[2]

String formattedMessage = message.replaceAll("\\\\", "");

Because the backslash is the escaping character in a regular expression replaceAll() receives one as parameter, which has to be escaped too.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 BigArmsWriteSmallCode
Solution 2 Shubam Virdi

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